QENERAL OBSERVATIONS. 329 



Nevertheless, it is an undoubted fact, that dur- 

 ing the autumnal or southern migration of the 

 Quail in September, they collect in vast 

 numbers on the European side, if there be a 

 west wind, and seem not to be able to pass 

 until it changes to the east ; this is so much the 

 case that, if the wind keeps in that quarter 

 during the migration, none hardly are to be 

 seen. 



" On some occasions the passage of the larger 

 birds of prey is a most wonderful sight ; but of 

 all the remarkable flights of any single species, 

 that of the common Crane has been the most 

 noteworthy that has come under my own 

 observation. 



" On the Andalusian side the number of birds 

 seen even by the ordinary traveller appears 

 strikingly large ; this being, no doubt, in a great 

 measure caused by the quantity which are, for 

 ten months, at least, out of the year, more or 

 less on migration ; that is to say, with the 

 exception of June and July, there is no month 

 in which the passage of birds is not noticeable, 



